(1-甲基磺酰基吡咯烷-2-基)甲醇

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Dess-Martin periodinane (1.7 g, 4 mmol) was added to a solution of (1-(methylsulfonyl)pyrrolidin-2-yl)methanol (0.570 g, 3.18 mmol) in anhydrous methylene chloride (20 mL). The reaction was stirred for 24 hours and a second portion of Dess-Martin periodinane (1 g, 2.3 mmol) was added. The resulting suspension was stirred for 24 hours, filtered, and concentrated. The crude residue was purified by silica gel column chromatography (1-15% ethyl acetate in methylene chloride) to provide a white waxy solid (0.44 g, 78%). 1H NMR (CDCl3, 300 MHz) δ 9.58 (d, 1H, J=1.2 Hz), 4.25-4.20 (td, 1H, J=6.9, 1.2 Hz), 3.55-3.44 (m, 2H), 2.97 (s, 3H), 2.21-2.13 (m, 2H), 2.05-1.90 (m, 2H). The resulting suspension was stirred for 24 hours filtered concentrated The crude residue was purified by silica gel column chromatography (1-15% ethyl acetate in methylene chloride)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Methyl 1-(methylsulfonyl)pyrrolidine-2-carboxylate (1.1 g, 4.6 mmol) in anhydrous tetrahydrofuran (10 mL) was added slowly to a stirring suspension of lithium aluminum hydride (0.259 g, 6.8 mmol) in anhydrous tetrahydrofuran (10 mL) kept at 0° C. with an external ice bath. After fifteen minutes, the ice bath was removed and the reaction was allowed to warm to ambient temperature and stirred for an additional hour. The mixture was cooled to 0° C., and water (1 mL) was added dropwise, followed by 15% aqueous sodium hydroxide (1 mL), and water (3 mL). The mixture was stirred for 15 mins at room temperature, followed by the addition of magnesium sulfate and additional stirring. The mixture was filtered through Celite, washed three times with ether, and the combined organic fractions concentrated under reduced pressure to afford a yellow oil (0.7 g, 77%). 1H NMR (CDCl3, 300 MHz) δ 3.78-3.57 (m, 3H), 3.49-3.36 (m, 2H), 2.87 (s, 3H), 2.64 (br s, 1H), 2.09-1.82 (m, 4H). kept at 0° C. with an external ice bath After fifteen minutes the ice bath was removed The mixture was cooled to 0° C. water (1 mL) was added dropwise The mixture was stirred for 15 mins at room temperature followed by the addition of magnesium sulfate and additional stirring The mixture was filtered through Celite washed three times with ether the combined organic fractions concentrated under reduced pressure